How many? All of em! <img src="/forums/images/graemlins/grin.gif" alt="" />

Concrete/lava mix molcajetes usually found at garden centers, posh 'gormet' kitchenware places, and are for looks, but people try to use them for cooking. The real ones are what ground the tortillas I grew up on. Pretty common around here in north Mexico (Tejas) As you probably know, there is a HUGE difference between machine made and hand gound/patted masa tortillas. <img src="/forums/images/graemlins/grin.gif" alt="" />